Most of the "we should just get all the taxes from rich people" arguments ignore two fairly important things.
The first is how asset markets works, i.e. why rich people are rich. It's because there are finitely many assets and whenever anyone rich gets more money, they use it to bid up the prices. But that makes high taxes on rich people do something unintuitive at scale: It takes away the money that was making the stock market go up. And then not only do they have less money, they also have less income, because the people who would have paid them for their stock also have less money, which makes stock prices go down. Which means that increasing their tax rate from e.g. 25% to 50% doesn't generate anywhere close to twice as much revenue, and it also lowers the growth rate in the tax revenue you get from them. Which means that raising the rate will, in the long term, inherently generate less revenue. Whether you end up underwater in 48 months or 48 years depends on what the existing and proposed rates are and what the economy looks like, but there is always some period of time after which a reduction in the compounding rate is going to absorb any percentage increase in the tax rate. At which point you're paying the recurring costs and lower compounding rate from the higher tax rate indefinitely in exchange for no additional revenue, and indeed for less government revenue.
And the second is that Congress wants money to spend, so they're going to do the things that cause them to have more money to spend. Now imagine what kind of non-tax policies they're going to implement if the tax system makes it so the only way they get more money to spend is if they transfer wealth from the poor to the rich. We don't actually have an effective solution to the principal-agent problem, so perverse incentives are bad, right?
Most of the "we should just get all the taxes from rich people" arguments ignore two fairly important things.
The first is how asset markets works, i.e. why rich people are rich. It's because there are finitely many assets and whenever anyone rich gets more money, they use it to bid up the prices. But that makes high taxes on rich people do something unintuitive at scale: It takes away the money that was making the stock market go up. And then not only do they have less money, they also have less income, because the people who would have paid them for their stock also have less money, which makes stock prices go down. Which means that increasing their tax rate from e.g. 25% to 50% doesn't generate anywhere close to twice as much revenue, and it also lowers the growth rate in the tax revenue you get from them. Which means that raising the rate will, in the long term, inherently generate less revenue. Whether you end up underwater in 48 months or 48 years depends on what the existing and proposed rates are and what the economy looks like, but there is always some period of time after which a reduction in the compounding rate is going to absorb any percentage increase in the tax rate. At which point you're paying the recurring costs and lower compounding rate from the higher tax rate indefinitely in exchange for no additional revenue, and indeed for less government revenue.
And the second is that Congress wants money to spend, so they're going to do the things that cause them to have more money to spend. Now imagine what kind of non-tax policies they're going to implement if the tax system makes it so the only way they get more money to spend is if they transfer wealth from the poor to the rich. We don't actually have an effective solution to the principal-agent problem, so perverse incentives are bad, right?